| 摘要 |
An apparatus and method are disclosed for automatically and periodically measuring the level of a patient's blood glucose when a patient has a catheter in a blood vessel. A wearable, disposable test unit is attached by air, fluid and electric lines to a bedside monitor. The test unit has a glucose oxidase electrode for measuring blood glucose. A pumping chamber in the unit contains a pneumatic pump which draws blood into the device and then expels all but a residual portion of blood back into the patient's blood vessel catheter. A testing area is formed in a passageway adjacent the pumping chamber. A test is done either when the pumping chamber is filled with blood, or on the blood filling the passageway when the pumping chamber is empty. The test cycle is repeated about every 60 seconds. Provision is made to automatically calibrate the device every few hours or whenever calibration is required.
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